 | Euclid, James Thomson - 1845 - 382 σελίδες
...— The angles which one straight line makes with another upon the one side of it are together equal to two right angles. Let the straight line AB make...upon one side of it, the angles CBA, ABD ; these are together equal to two right angles. For, if the ancle CBA be equal to ABD, each of them (I. def. 8)... | |
 | Euclides - 1845 - 546 σελίδες
...straight line makes wilh another upon one side of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make...with CD, upon one side of it, the angles CBA, ABD. Then these shall be either two right angles, or shall be together, equal to two right angles. E A i... | |
 | Scottish school-book assoc - 1845 - 444 σελίδες
...THKOREM. The angles ACD and DCB, which one straight line, DC, makes with another, AB, on one side of it, are either two right angles, or are together equal to two right angles. A If the Ls ACD and DCB be equal, each of them is a i'L, (Def. 9.) ; but if they are not equal, conceive... | |
 | Euclid - 1845 - 218 σελίδες
...PROPOSITION XIII. THEOR. — The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. EUCLID'S ELEMENTS. For if the angle CBA be equal to ABD, each of them { 10 DeV. 2 Ax. 2 AX. D CD is... | |
 | Euclides - 1846 - 292 σελίδες
...QEF PROP. XIII. THEOR. The angles, which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make with CD, upon one side of it, the angles CBA, ABD : these are either... | |
 | Great Britain. Admiralty - 1846 - 128 σελίδες
...DBA, ABC; then /_ DBA + Z. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. Let AB make with DC, on the same side ABC=2rt. Zs DBCDBC If L ABC = L DBA, Der. 10. each of them is... | |
 | Euclid, John Playfair - 1846 - 334 σελίδες
...AB. 19 PROP. XIII. THEOR. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make with CD, upon one side of it the angles CBA, ABD ; these are either two... | |
 | Euclides - 1847 - 128 σελίδες
...XIII. THEOR. GEN. ENUN. — The angles, which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. PART. ENUN. — Let the st. line AB make with CD, upon one side of it, Fig. 1. the Zs CBA, ABD; then... | |
 | Great Britain. Council on Education - 1848 - 596 σελίδες
...equilateral triangle. Prove that the angles, which one straight line makes with another upon one side of it are either two right angles, or are together equal to two right angles. 2. The angles at the base of an isosceles triangle are equal to each other. 3. Define parallel straight... | |
 | Euclides - 1848 - 52 σελίδες
...it. PROP. XIII. THEOREM. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. PROP. XIV. THEOREM. If, at a point in a straight line, two other straight lines, upon the opposite... | |
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The angles which one straight line makes with another upon one side of i't, are either two right angles, or are together eqval to two right angles. 
